Both the National and local (Dee Estuary) Wetland Bird Survey (WeBS) reports have recently been published. I always look forward to these as it gives us a chance to see how our birds are doing by looking at trends and numbers, and I always find the movements of our estuary birds fascinating. Both reports cover the period from July 2012 to June 2013. As there is a lot of interest in both I will write two articles - this one is for Grebes and Wildfowl - but I want to emphasise this is just a summary concentrating on just a few species as I don't want to just repeat what is written in the reports. As well as discussing Dee estuary and National trends I will also be referring to nearby sites such as the Alt, Mersey and Ribble Estuaries.
Apart from a short period in the mid-1990s, when they reached the heady heights of 246, WeBS counts for the Dee Estuary have always been around the 50 mark. That is until the large flock off North Wirral was discovered in 2006; quite how many are out there is open to question because counts depend very much on conditions during counting - the better the conditions (i.e. flat calm and clear) the more you see. But since 2006 max numbers have ranged from 378 to 1,195, in the winter of 2012/13 the max count was 976. With the five year mean at 773 this means the Dee Estuary/North Wirral is now the second most important site in the UK. The most important site is Dungeness and Rye Bay and they had a whopping 3,000 in the winter of 2012/13, which is a record count for that site and, I believe, is the highest ever single site count for the whole of the UK. Just across the Irish Sea in Northern Island the five year average for Belfast Lough is 869 and for Loughs Neagh and Beg it is 726, it would seem likely that there is much inter-change of birds between these sites and North Wirral.
One of the most pleasing aspects of birdwatching on the Dee Estuary over the past few years has been the big increase in Pink-footed Geese numbers. From just 340 in the winter of 2008/09 the max WeBS count for 2012/13 had risen to 4,020, with at least two counts of 5,000 made on non-WeBS count days. These counts are almost certainly the highest ever made of Pink-footed Geese actually on the estuary (not counting fly-overs), nevertheless these numbers are small compared with sites nearby with 59,135 being the five year average for south-west Lancashire and a max count of 11,667 made on the Alt Estuary in the winter of 2011/12. Nationally, numbers showed quite a steep decline in 2010/11 and 2011/12 reaching a minimum of 260,325 (a decrease of about 25%), but bounced back in the autumn of 2012 to a high of 359,175. The dip in numbers in the previous two winters were thought to be a combination of a real, but small, decrease in numbers plus under-counting due to the late arrival of several thousand geese from Iceland (see WWT Waterbird monitoring).Read more about Pink-footed Geese on the Dee Estuary by clicking here.
The max Dee estuary count for 2011/12 was very low with 5,245 - the lowest since 1988/90. Numbers recovered somewhat in 2012/13 to 9,166 in September, just below the five year average of 9,560. 5,128 were on the estuary in August 2012 indicating that they were probably moulting on the Dee. Shelduck have been known to have moulted in large numbers on the Mersey estuary since 1997 and it is the most important moulting site for this species in the country with a peak in late summer of between 10,000 and 20,000. In 2006/07 the five year average for the Mersey was 16,676 and easily the highest count in the country for any time of year. However, since 2009 much lower numbers have been present although this is partly due to the estuary having incomplete coverage during the summer WeBS counts so the true figure was unknown. Pleasingly, there was a count of 12,601 in August 2013 indicating that this moulting flock does still exist.
At the present time the Dee estuary is the most important site in the country for this species.
A big drop in numbers on the Dee estuary in 2011/12, to 1,177, was followed by a rebound in 2012/13 with a max of 4,759 which is above average for the past 20 years. Nationally, counts have shown a small decrease since reaching a peak in 2005/06, the same winter when counts here on the Dee estuary had reached their highest level (6,695) since 1994/95. The nearby Ribble estuary has the highest counts in the country and reached a remarkable 101,594 in the winter of 2008/09, although since then numbers have dropped quite substantially reaching a peak of only (!) 46,519 in 2012/13.
1. On-line WeBS Report 2012/13 - http://www.bto.org/volunteer-surveys/webs2. Colin Wells and Neil Friswell, Dee Estuary and North Wirral Foreshore WeBS Annual Report 2012/2013.
The small group of us on the Dee estuary who regularly look for and log colour-ringed birds (mainly waders and gulls) have now amassed a large database of fascinating data which has also contributed to the various long-term studies of the relevant species. In the past I've shared some of this with you in various articles, I will continue to do that but I thought a better way to pass this information on more promptly is to have a monthly summary/highlights. So here is the first one covering July and August 2014:
Gull 'TMEN', ringed
near Lodz, Poland, in April 2013.
Recorded July 7th and 9th 2014 at West Kirby. A very early return if it bred in Poland in 2014.
Previous records: Six records between September 2013 and January 2014, all at West Kirby.
Recorded August 1st 2014 at New
Previous record: Nov 3rd 2013 at New Brighton.
Gull '3AAH', ringed in Copenhagen as a chick in June 2013.
Recorded August 12th 2014 at West Kirby.
Previous records: July 27th 2013 at Utoxeter, Sep 6th and 10th 2013 at West Kirby.
(the first letter denotes the flag colour - in this case White - and
the number it's position on the legs), ringed in the Banc d'Arguin,
Mauritania, West Africa, on Dec 12th 2009.
Recorded August 12th 2014 at Hoylake. Our first colour-ringed Sanderling either ringed or observed in Africa.
Previous records: recorded every winter at Banc d'Arguin since Dec 2009, but never before seen outside Africa.
R/GWR ringed in the north-west corner of Spain on May 17th 2011 whilst on spring passage. Recorded on Aug 11th and 12th at Hoylake.
L/LRO ringed in the north-west corner of Spain on May 4th 2013 whilst on spring passage. Recorded on Aug 11th at Hilbre.
ringed in the north-west corner of Spain on March 11th 2011.
Recorded on Aug 11th at Hoylake.
It is always exciting to see waders on
passage knowing that many have flown all the way from thehigh Arctic
and are on their way to spend the winter in Africa. This year we had
numbers of Dunlin and the count on Hoylake and West Kirby shore of
12,700 on the 10th makes it the highest Wetland Bird Survey count in
the 1970s, and that's without adding the birds which will have been at
Point of Ayr, Gronant and elsewhere. Numbers of Ringed Plover didn't
quite reach last year's max of 1,600 but 1,400 at Hoylake on August
26th was still one of the highest of recent years. The Black-tailed
Godwit flock at Gilroy Nature Park kept on increasing and reached 2,400
by the end of the month and I feel privileged to have been able to
spend many hours in close proximity to these wonderful birds. Rarer
passage waders included a couple of Curlew Sandpipers and Little Stints
at Hoylake, two Wood Sandpipers at Burton Mere Wetlands, several Green
and Common Sandpipers, Spotted Redshanks and Greenshanks at various
The remains of Hurricane Bertha pushed many Manx Shearwaters close to the shore with 1,258 counted from Hilbre on the 10th with five Arctic Skuas there a few days later. Otherwise sea-watching was quite quiet but we did see a Black Tern and max counts of 250 Little Terns, 245 Common Terns and 1,057 Sandwich Terns.
There were three single Ospreys seen
plus several reports of both Marsh and Hen Harriers through the month.
9th September, 11.57hrs (BST), 9.8m.
10th September, 12.42hrs (BST), 9.9m.
11th September, 13.24hrs (BST), 9.9m.
12th September 14.05hrs (BST), 9.6m.
Organised by the Wirral
Ranger Service , Flintshire
Countryside Service and the
RSPB (Dee Estuary):
All these events and walks have bird interest, even those not advertised specifically for birdwatching. No need to book for these events unless specified - please check below.
Also see 2014 Events Diary.